HVDC送端交流系统故障暂态过电压评估指标

doi:10.12204/j.issn.1000-7229.2023.01.008

电力建设 ›› 2023, Vol. 44 ›› Issue (1): 64-72.doi: 10.12204/j.issn.1000-7229.2023.01.008

HVDC送端交流系统故障暂态过电压评估指标

刘晓琳¹, 曹泽宇¹, 高丙团¹(), 蒋维勇², 周专³, 王新刚³, 张锋³

1.东南大学电气工程学院,南京市 210096
2.国网经济技术研究院有限公司,北京市 102209
3.国网新疆电力有限公司,乌鲁木齐市 830011

收稿日期:2022-02-22 出版日期:2023-01-01 发布日期:2022-12-26
通讯作者: 高丙团 E-mail:gaobingtuan@seu.edu.cn
作者简介:刘晓琳(2000),女,硕士研究生,主要从事高压直流输电控制与分析的研究工作。
曹泽宇(1994),男,博士研究生,主要从事交直流系统稳定分析的研究工作。
蒋维勇(1979),男,博士,教授级高级工程师,主要从事交直流电力系统分析、直流输电技术的研究工作。
周专(1987),男,硕士,高级工程师,主要从事电力系统分析与规划的研究工作。
王新刚(1979),男,学士,高级工程师,主要从事电网规划的研究工作。
基金资助:
国家电网公司科技项目“提升交直流混联电网动暂态性能的直流控制优化研究”(5230HQ21000S)

Evaluation Index of Transient Overvoltage During Fault at HVDC Sending-End AC System

LIU Xiaolin¹, CAO Zeyu¹, GAO Bingtuan¹(), JIANG Weiyong², ZHOU Zhuan³, WANG Xingang³, ZHANG Feng³

1. School of Electrical Engineering, Southeast University, Nanjing 210096, China
2. State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China
3. State Grid Xinjiang Electric Power Corporation, Urumqi 830011, China

Received:2022-02-22 Online:2023-01-01 Published:2022-12-26
Contact: GAO Bingtuan E-mail:gaobingtuan@seu.edu.cn

摘要/Abstract

摘要：

特高压直流输电系统直流闭锁故障及交流系统短路故障引起的暂态过电压,对系统稳定性造成严重冲击。量化评估交直流系统暂态性能指标,对确定交直流电力系统规划设计和调度运行具有指导意义。对交流系统暂态过电压机理进行分析,推导出基于无功补偿和短路比的暂态过电压计算方法,基于系统短路比与补偿电容和交流滤波器参数的比值定义了暂态电压评估指标R_r。研究表明,随着该暂态电压评估指标R_r减小,系统故障后送端换流母线暂态电压升高,受端也会发生不同程度的换相失败。最后,基于国际大电网会议直流标准测试系统,验证了所提指标的有效性。

关键词: 特高压直流输电, 暂态过电压, 评价指标, 送端交流系统

Abstract:

The transient overvoltage caused by the DC blocking fault of the UHVDC transmission system and the short-circuit fault of the AC system has a serious impact on the stability of the system. Quantitative assessment of the transient performance index has important guiding significance for the dispatching operation of AC/DC power system. This paper analyzes the mechanism of transient overvoltage in AC system, deduces the calculation method of transient overvoltage on the basis of reactive power compensation and short-circuit ratio, and then defines the transient voltage evaluation index R_r. Research shows that, as the index R_r decreases, the transient voltage of the commutation bus at the sending end will increase after a system fault, and commutation failures will also occur at the receiving end. Finally, on the basis of the CIGRE benchmark HVDC standard test system, the effectiveness of the proposed index R_r is verified.

This work is supported by State Grid Science and Technology Project (No. 5230HQ21000S).

Key words: ultra-high voltage direct current transmission, transient overvoltage, evaluation index, sending-end AC system

中图分类号:

TM721

刘晓琳, 曹泽宇, 高丙团, 蒋维勇, 周专, 王新刚, 张锋. HVDC送端交流系统故障暂态过电压评估指标[J]. 电力建设, 2023, 44(1): 64-72.

LIU Xiaolin, CAO Zeyu, GAO Bingtuan, JIANG Weiyong, ZHOU Zhuan, WANG Xingang, ZHANG Feng. Evaluation Index of Transient Overvoltage During Fault at HVDC Sending-End AC System[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(1): 64-72.

图/表 14

图1 直流输电系统电路结构原理

Fig.1 Schematic diagram of a DC transmission system circuit

图2 HVDC系统逆变侧控制框图

Fig.2 Control block diagram of the inverter side of HVDC system

图3 高压直流输电送端系统等值电路

Fig.3 Equivalent circuit on the rectifier side of HVDC system

图4 测试模型

Fig.4 Test system

表1 仿真系统参数

Table 1 Test system parameters

图5 三相短路故障下的暂态响应曲线

Fig.5 Transient response curve under three-phase short-circuit fault

图6 直流闭锁故障下的暂态响应曲线

Fig.6 Transient response curve under DC blocking fault

表2 基于无功补偿的三相短路故障暂态电压变化

Table 2 Transient voltage changes of three-phase short-circuit faults with reactive compensation

表3 基于无功补偿的直流闭锁故障暂态电压变化

Table 3 Transient voltage changes of DC blocking faults with reactive compensation

表4 基于短路比的三相短路故障暂态电压变化

Table 4 Transient voltage changes of three-phase short-circuit faults considering SCR

表5 基于短路比的直流闭锁故障暂态电压变化

Table 5 Transient voltage changes of DC blocking faults considering SCR

图7 暂态过电压与指标Rr关系

Fig.7 The relationship between transient overvoltage and indicator Rr

图8 三相短路故障下的控制角响应

Fig.8 Control angle response under three-phase short-circuit fault

图9 换相失败对暂态电压及关断角影响

Fig.9 The effect of commutation failure on transient voltage and turn-off angle

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HVDC送端交流系统故障暂态过电压评估指标

Evaluation Index of Transient Overvoltage During Fault at HVDC Sending-End AC System

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